4、CentOS7安装MySQL

下载并安装MySQL官方的Yum Repository

[root@hadoop-100 software]# wget -i -c http://dev.mysql.com/get/mysql57-community-release-el7-10.noarch.rpm
[root@hadoop-100 software]# yum -y install mysql57-community-release-el7-10.noarch.rpm
[root@hadoop-100 software]# yum -y install mysql-community-server

MySQL数据库设置

启动MySQL

[root@hadoop-100 software]# systemctl start mysqld.service

查看MySQL运行状态

[root@hadoop-100 software]# systemctl status mysqld.service

 

查看MySQL运行状态.png

获取此时root用户的密码

[root@hadoop-100 software]# grep "password" /var/log/mysqld.log

 

初识密码.png

进入数据库

[root@hadoop-100 software]# mysql -u root -p

修改初始密码

mysql> ALTER USER 'root'@'localhost' IDENTIFIED BY 'new password';
此时，如果新密码太简单，会报错

修改使可以设置简单密码

set global validate_password_policy=0;
set global validate_password_length=1;
重新修改密码即可

卸载MySQL官方的Yum Repository

yum -y remove mysql57-community-release-el7-10.noarch